Steam at 320°C flows in a stainless steel pipe (k = 15 W/m - °C) whose inner and outer diameters are 5 cm and 5.5 cm, respectively. The pipe is covered with 3-cm-thick glass wool insulation (k = 0.038 W/m - °C). Heat is lost to the surroundings at 5°C by natural convection and radiation, with a combined natural convection and radiation heat transfer coefficient of 15 W/m2 -°C. Taking the heat transfer coefficient inside the pipe to be 80 W/m2 - °C, determine the rate of heat loss from the steam per unit length of the pipe. Also determine the temperature drops across the pipe shell and the insulation.

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Draw the schematic diagram of the thermal circuit of the pipe Calculate the area of cross section at ... View the full answer